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n.1.(Zool.) That portion of the labium which bears the palpi in insects.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Labial palp long, slender, ~0.75x length of mandible; basal segment with one short, dorsal setabasally, three setae distally (two mesal, one lateral); middle segment long, with long, undivided basal subsegment bearing ~ five setae, five shorter mesal subsegments, with one seta mesally, elongated terminal subsegment, with two long setae distally; terminal segment ~one-third length of middle segment, slightly tapered distally, terminus with several very small setae; palpiger erect, with relatively straight sides, with one mesal seta, one lateral seta; mentum with smooth plate mesal to stipes, lateral to palpiger, with three pairs of long setae; cardo and stipes elongate, narrow, longitudinally arranged; cardo behind stipes.